Pump



J. P. HESS Aug. 30, 1932.

PUMP

3 Sheets-Sheet 1 Filed Nov. 28, 1927 INVENTOR.

A TTORNEYS Aug. 30, 1932.

J. P HESS PUMP Filed Nov. 28. 1927 Sheets-sheet 2 Aug. 3o, 1932.l J P, HESS 1,874,010

pum

' lFiled Nov. 28, 1927 5 Sheets-Sheet 5 Fyy.

y da V37 A TT ORNEYS Patented Aug. 30, 1932 e Jenn nnss, or MiLwAEUKnE, wisconsin n PUMP yApplication 1ed November 28, 1927. Serial No. 236,101.

My 'invention l relates to improvements, in

` 1 l l i Y v The object of my invention lfis lto provide a pump comprisingla plural-ity of reciprof eating elements actuatedfby a--cam ofyariable pitch. 4 ,Y VMoreYparticula--rly stated, it is the object of my invention to prov-ide acam for the actuation offrecprocating elements wherein portions of ,the faceY Vof the cam maybe eX- tended or' changed in their configuration so as to vary the throw 4'of ,the'reeiprocating' elements. v

L Itis a further object of my invention to provide a' pump for ,continuous rotation in either'dire'ction in which cammeans are provided to enable the voperator -to change' the direction of flow of vfluid through the pump or to vary the quantity of lflow at will. In the drawings Figure 1 is 1a side view of -mypump show- .ing portions -cut away to exhfbittheV various elements of my device. I Y Y- i Y je Figure :2 isa side viewfzof the cam upon which the reciprocating elements of vmy de-` vice foperate. ij i Figure 3 is a detail view-ofr'my control handle for actuating Qthefcam. v e

Figure 4 is ia. vertical section through the central .portion of my pump mechanism-showing the cam `and controlftherefor. 1 ,l

Like parts are identified by the -samewreferenceV characters .throughout the' several Views. l l' A Hydraulicalfly operable mechanisms for connection lwith the (usuali-ine shafts Orother Vpower supply devices in factories must be supplied with reversing means rincorporated within suclrdevicesand must besupplied Vwith 'means for varying their speed -ofoperation -and I have, therefore, provided a device which will 'be capable of easymanual control and which maybe easily incorporated into .-a hydraulic vor l,fluid operating `mechamsm. f s

wings 25 andv26 pivotally securedr to said lowing rollers present one flange of; their pe- Mydevice Vcomprises a rotarypump mechanism wherein the rotor 10 is provided with aiplurality of cylinders 11. Withineach of these cylinders is a piston 12 with a connect-y ing rod` 13 extending 'inwardly 'toward 4a 5g cam 14, the construction of which constitutes an important feature of myl inventiom Between the cam14 and the connecting rods 13 I provide rollers 15 mountedupon pivot pins 16 which guide the rollers upon the face of 55 the cam. Between the rotor 10 and the connecting rods 13,v I 1 have provided springs` 16. These springs, constantly force the connecting rods and the `rollers tightly against the faceV of the lcam 14. -V

Surrounding the rotor 10 isan annular stator 17 which is provided with channel-s 18 and 119, 54 and 55. Pipeconnections into the channels 18 and 19 provide conduits through which liuid may be supplied to the pumping 'mechanismfin my device, supply pipes 2O pro- .V'idin'g fluid tothe *channelsy 18, 19 and pres- 'sure pipes 21 receiving fluid under pressur from the channels 54 and-55. As shown in Figure 1, the ca1nv14 comprises several elements -pivotally secured toone another, thebodyV of thecam as shown at 2,2 in Figure -4 having splined portions 23 adapted to' meet with corresponding portions 24 in two "lb body`22 at 27 and 28respectively, the splined portions ofthe cambody and said wings being sufliciently extended to ,enable the wings ,to respectively collapse intoythe body of the cam 22 so that the entire cam mechanism in closed position will present to the rollersfl a continuous circular path upon which to follow. v When a wing is extended the cam lfolriphery to a channel centrallydisposed in the 5 wing body, and this one flange guides the cam follower over the extended wing. When the follower reaches the mainbody of the cam, the other flanges of the follower assume their positions in the cam tracksasihdicated new lill

in 4. This cam and its respective parts are mounted upon a shaft 29 which is carried by bearing supports 30 and 31. A hub 32 is integral with the rotor 10. The other 39 meshed with the teethof the sector Atm the inner end of the shaft 38 I have provided a pinion 40 which is adapted to interact witha rack 41 upon the control 42 as shown in Figure2. 1 y i The curved faces 43 and 44 of the control 42 are so constructed 'as to' Vabut the inner surfaces of the Vwings 25 and 26.

The'ope'rationdof my improved pump is as follows a supply offluid through conduits 2Ofisl provided by4 means of an ordinary gear pump and thefluid so supplied-flows into the channels 18, 19 where it'rnay'flovv into the cylinders 1'1 in quantities controlled by the position of the pistons 12.'v The`vposi-- tion of the vpistons, iscontrolled in' turn by the springs 1 6 andthe cam 14 and obviously so long as thecam 14re'tains its circular form there will be no movement `of the Vpistons12 to displace the fluid which may be lodged in the cylinders. However, 4if `fluid is to be forcibly provided to one of the channels 54 or 55, the control handle 35 may beso turned as to project the control 42against oneof the wings ofthe cam, thereby forcing said wing outwardly to provide an extended surface-bei yond Ythe normal circular circumference of the cam with the result that when the cam follower or roller 1 5 ofaparticular pistonl2 rides up upon thesaidextended wing,-the fluid contained in the cylinder 11 -will be forced outwardly into the channel V55 upon the side affected by saidwing. Each piston in turn as it is brought around to that side of the' cam by the rotation' ofthe rotor l0 will in turn beforced outwardly as it reaches the channel 55 and willdischarge its fluid into said channel and into theconduit 21 to be con? ducted under pressure to the portion of the hydraulic mechanism where it vis Vto do its work.Y f Obviously my pumping mechanism is "subject' to an infinite'number of gradations of hydraulic power 4supply for the control'han dle be moved inv either direction from acentral neutral positionas shown 'in Figure 3 and a ratchet plunger 51 interacting with sockets 52' at various position-s in the arc'of lts swing may provide any number of'indicated speeds of operation through the con'- trolof the quantity of'iiui'd to be'd'i'splacedf by the pistons 12 in proportion to the extent of displacement of the Wings 25 and 26, since a slight outward extension of one of said wings will obviously displace only a small amount of fluid under pressure in the channels 54, 55 and the conduit 21.L

In connection withV each ofthe channels 54, 55 I have provided an extreme limit beyond which the pressure of oil in the channels 54, 55 may not go, for I have incorporated in the pressure pipe 21 a pair of safety valves 53 adjustable Yltofcertain; predetermined pressures. Y Y y Y Y A J In the rotation of the rotor 10, therefore, aconstant speed `maybe maintained in a single di'relc'tio'r andeuantities of fluidmay be Ypumped in one direction or another in the conduits 21 a-ccording to the position of the if control;42,for;if theicentrol extends the wing 25, Huid pressure will be developed in chaniierranaifrhe controlextendsrthewingae, pressure will be induced inl channel 55,"caus-i ing "a reversal ofy 'flowV of fluidfandf therefore a reversal of the mechanism operated Vby 'my udpressurelpump. i* 1 i i Iclaim:

' A pump comprising "an annularr stator interi'orly channeled at spaced points Vto pro# vide aplurality"v of supplych'a`nnels and a plurality of discharge channels, an annular rotor fittedTwithingjthe-statr, and'provided with outwardly opening "cylinders", pistons in the cylinders, connecting rodssecured to the pistons "and providedf'with rollers, and a cam providing variable pitched facesV lfora track fori said rollers' 'whereby selectively alternativelyjtc'i'V supply-material to said cylinders fromeither-'of 4s'aidfsupply channels and dis* charge it into'either of the'V discharge channels. 1f L YV"2 .-A pump/com rising'V arr-annular stator interiorlyj channeled at `spaced Vpointslto 'provide a plurality of supply discharge ducts,an' annularfrotorfitted Within the stator and provided with an outwardly opening cylinder, a piston in the cylinder Vadapted inV -its reciprocation to? draw materialv from one of the supply `ducts and discharge material into foney Aof said discharge Vducts 'in the revolution offthel rotor, a camlp'rovided with controllable] lwingy portions,- andj'connecting rodsactuated by saidl cam to cause reciprocation of the pistons, whereby selectively toutif lize one supply and one discharge channel.

' 3. vAY pumpcomprisinga stator anda rotor, 'cylinders in the rotor'provided with pistons and connecting rods carried by said rotor said cylinders being 'so disposed with respect to the lrotory that the rotor forms a 'cylinder head therefor', )andra cam substantially centrally located within the staten and rotor said cam being provided with adjustable wings laffording'cam face portions ofvariable Vpitch whevreb'y?V to providefor reversal lof! the circulation of the pump.

"lio

4:. A pump comprising the combination with an annular stator interiorly channeled at spaced points to provide a plurality of supply ducts and a plurality of discharge ducts, of a rotor within said annular stator and provided with outwardly opening cylinders, pistons in said cylinders provided with connecting rods extending inwardly from the stator, an adjustable actuator for said connecting rods substantially centrally located with reference to the stator whereby in the adjustment of said actuator the said pistons through their connecting rods may selectively be actuated to receive a supply of material from either of the` supply ducts and discharge said material into either of the discharge ducts.

JOHN P. HESS. 

